40 CFR § 62.15405 - What authorities are retained by the Administrator?
(a) Approval of alternative non-opacity emission standard;
(b) Approval of alternative opacity standard;
(c) Approval of major alternatives to test methods;
(d) Approval of major alternatives to monitoring;
(e) Waiver of recordkeeping; and
(f) Approval of exemption to operating practice requirements in § 62.15145(e)(5).